The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 20 | 0 |
| 21 | 5 |
| 22 | 6 |
| 23 | 15 |
| 24 | 17 |
| 25 | 31 |
| 26 | 30 |
| 27 | 33 |
| 28 | 51 |
| 29 | 50 |
| 30 | 54 |
| 31 | 77 |
| 32 | 76 |
| 33 | 75 |
| 34 | 80 |
| 35 | 107 |
| 36 | 106 |
| 37 | 105 |
| 38 | 143 |
| 39 | 142 |
| 40 | 111 |
[0,5,6,15,17,31,30,33,51,50,54,77,76,75,80,107, 106,105,143,142,111] |